# ARS HVAC
> Published answers about HVAC, Plumbing, and Electric, written from ARS HVAC's own material and reviewed by a person before publication.
Main site: https://ars.com
Research hub: https://askdae.com/t/ars/answers
Full text: https://askdae.com/api/public/answers/ars/md
## Answers
- [Why is my AC running continuously but not cooling the house below 78 degrees?](https://askdae.com/t/ars/answers/why-is-my-ac-running-continuously-but-not-cooling-the-house-below-78-deg)
- [Cost to replace 100 feet of main sewer line using trenchless pipe bursting](https://askdae.com/t/ars/answers/cost-to-replace-100-feet-of-main-sewer-line-using-trenchless-pipe-bursti)
- [Should I repair or replace a 12-year-old R-410A air conditioner with a leaking coil?](https://askdae.com/t/ars/answers/should-i-repair-or-replace-a-12-year-old-r-410a-air-conditioner-with-a-l)
- [How do I safely replace a standard wall thermostat with a smart thermostat?](https://askdae.com/t/ars/answers/how-do-i-safely-replace-a-standard-wall-thermostat-with-a-smart-thermost)
- [Can a cracked furnace heat exchanger be welded or must the unit be replaced?](https://askdae.com/t/ars/answers/can-a-cracked-furnace-heat-exchanger-be-welded-or-must-the-unit-be-repla)
- [What's the difference between single-stage, two-stage, and variable-speed HVAC compressors?](https://askdae.com/t/ars/answers/what-s-the-difference-between-single-stage-two-stage-and-variable-speed)